h1 {
    color: #0077bb; /* 将标题改为蓝色 */
    font-weight:bolder;
}
h3 {
    margin:5px 0;
    font-size:18px;
    font-weight:bolder;
}

h2 {
    font-weight:bolder;
    margin: 35px 0 20px;
    font-size: 24px;
    border-bottom: 1px solid #ccc;
    padding-bottom: 5px;
}

h4{
    font-weight:bolder;
    font-size:15px;
}
